JPH08165537A - Low thermal expansion aluminum alloy for die casting and automobile part - Google Patents
Low thermal expansion aluminum alloy for die casting and automobile partInfo
- Publication number
- JPH08165537A JPH08165537A JP30736194A JP30736194A JPH08165537A JP H08165537 A JPH08165537 A JP H08165537A JP 30736194 A JP30736194 A JP 30736194A JP 30736194 A JP30736194 A JP 30736194A JP H08165537 A JPH08165537 A JP H08165537A
- Authority
- JP
- Japan
- Prior art keywords
- thermal expansion
- aluminum alloy
- coefficient
- die casting
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Retarders (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ダイカスト鋳造で製造
される熱膨張係数の低いアルミニウム合金及びこの合金
を用いた特にディファレンシアル用部品等の自動車部品
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum alloy having a low coefficient of thermal expansion produced by die casting, and an automobile part using this alloy, especially for differential parts.
【０００２】[0002]
【従来の技術】最近の省エネルギーの観点から自動車部
品の軽量化が推進されており、例えばディファレンシア
ル等の部品が鉄からアルミニウム等の軽合金への材料の
置換が進められている。自動車のディファレンシアル
（作動装置）は、例えば自動車が曲線を通過する時に、
自動的に左右の駆動輪の回転速度に差をつけて、良好な
操縦性を確保するために設けられている。2. Description of the Related Art Recently, from the viewpoint of energy saving, weight reduction of automobile parts has been promoted, and, for example, parts such as differentials are being replaced with materials from iron to light alloys such as aluminum. The differential of a car is, for example, when the car goes through a curve,
It is provided to automatically differentiate the rotational speeds of the left and right drive wheels to ensure good maneuverability.
【０００３】このディファレンシアルは、ピニオンギア
とそれと噛み合うサイドギヤから構成されるディファレ
ンシアルギヤとさらにこれらを支えるベアリングからな
り、この外側をキャリア及びハウジングで覆った構造か
らなっている。上記のディファレンシアル用キャリア１
及びハウジング２（以下単にデフキャリア、デフハウジ
ングという）は、例えば図１に示すような形状を有し、
ダクタイル鋳鉄によって重力鋳造法により製造されてい
た。しかるに上記のような車両の軽量化の要請によっ
て、近年では、排気量が１５００ｃｃ以下の小型車の場
合に、ダイカスト法によりＡｌ−Ｓｉ−Ｃｕ系合金で形
成したデフキャリア及びハウジングが使用されるように
なってきた。This differential is composed of a differential gear composed of a pinion gear and a side gear meshing with the pinion gear, and a bearing for supporting them, and the outside of the differential gear is covered with a carrier and a housing. Carrier 1 for the above differential
And the housing 2 (hereinafter simply referred to as the differential carrier or differential housing) has a shape as shown in FIG. 1,
It was made of ductile cast iron by gravity casting. However, due to the demand for weight reduction of the vehicle as described above, in recent years, in the case of a small vehicle having a displacement of 1500 cc or less, a diff carrier and a housing formed of an Al—Si—Cu alloy by a die casting method are used. It's coming.
【０００４】[0004]
【発明が解決しようとする課題】Ａｌ−Ｓｉ−Ｃｕ系合
金にも種々あるが、機械的強度やコストの点から、重量
％（以下も同様）で、Ｃｕ：１．５〜３．５％、Ｓｉ：
９．６％〜１２％を含むアルミニウム合金（ＪＩＳ Ａ
ＤＣ１２材）が使用されている。またこのアルミニウム
合金を用いてダイカスト法で鋳造する場合、スリーブ内
に設けられたプランジャーチップを約１〜２ｍ／ｓｅｃ
で移動させることにより、溶湯を高速で金型のキャビテ
ィ内に射出するので、鋳造品に気泡、引け巣などが発生
し易くなり、又鋳造品が金型内に焼き付くといった現象
が生じ易くなる。そこで上記ＪＩＳＡＤＣ１２材を使用
する場合は、Ｍｇの含有量（ＪＩＳ規格では０．３％以
下）をできるだけ少なくすることで対策している。There are various Al-Si-Cu alloys, but in terms of mechanical strength and cost, the weight% (the same applies below), Cu: 1.5 to 3.5%. , Si:
Aluminum alloy containing 9.6% to 12% (JIS A
DC12 material) is used. When die casting is performed using this aluminum alloy, the plunger tip provided in the sleeve is about 1 to 2 m / sec.
Since the molten metal is injected into the cavity of the mold at a high speed by moving with, the bubbles and shrinkage cavities are likely to occur in the cast product, and the phenomenon that the cast product is seized in the mold is likely to occur. Therefore, when the JIS ADC12 material is used, a countermeasure is taken by reducing the Mg content (JIS standard 0.3% or less) as much as possible.
【０００５】ところが実際にアルミニウム合金製のデフ
キャリアやデフハウジングを使用する場合、鉄合金製
（通常は鋼製）のベアリングとの間に熱膨張係数の差に
伴う隙間が生じ、ベアリングが移動してピニオンギアと
サイドギアの噛み合いが悪くなりギア同士が焼き付いた
り、デフオイルが漏れ出すことにより、潤滑不良となり
焼き付くといった問題が発生した。ここで各材料の熱膨
張係数について調べたところ、ギヤやベアリングに用い
られる鉄合金が１２〜１３×１０-6／℃であり、従来用
いられているアルミニウム合金が２１〜２２×１０-6／
℃であることが分かった。従って、本発明の目的は、上
述した従来技術の問題である鉄合金とアルミニウム合金
との熱膨張係数の差を解決し、長期間に亙って安定して
使用出来るアルミニウム合金を提供することにある。However, when a diff carrier or diff housing made of aluminum alloy is actually used, a gap is generated between the diff carrier and the diff housing made of iron alloy (usually made of steel) due to the difference in coefficient of thermal expansion, and the bearing moves. As a result, the meshing between the pinion gear and the side gear deteriorates, the gears seize up, and the differential oil leaks out, causing poor lubrication and seizure. When the coefficient of thermal expansion of each material was examined here, the iron alloy used for gears and bearings was 12 to 13 × 10 −6 / ° C., and the conventionally used aluminum alloy was 21 to 22 × 10 −6 /
It was found to be ° C. Therefore, an object of the present invention is to solve the above-mentioned problem of the conventional art, that is, the difference in the coefficient of thermal expansion between the iron alloy and the aluminum alloy, and to provide an aluminum alloy that can be used stably for a long period of time. is there.
【０００６】[0006]
【課題を解決するための手段】前記問題点を解決するた
めには、両合金の熱膨張係数を、同じにすれば良いこと
は分かっている。しかし、アルミニウム合金の熱膨張係
数を鉄合金に近づけるためには熱膨張係数を約半分にす
る必要があり、実質的に不可能である。そこで本発明者
らは鋭意検討した結果、実際のデフキャリアやデフハウ
ジングとして使用するのは高々１００〜１４０℃程度で
あり、実際にはアルミニウム合金の熱膨張係数は１８〜
２０×１０-6／℃程度で有れば問題がないことを見い出
し、アルミニウム合金の熱膨張係数を低下するために種
々検討を行った。In order to solve the above-mentioned problems, it is known that both alloys should have the same coefficient of thermal expansion. However, in order to bring the thermal expansion coefficient of the aluminum alloy close to that of the iron alloy, the thermal expansion coefficient needs to be about half, which is practically impossible. Therefore, as a result of intensive studies by the present inventors, the actual differential carrier or differential housing to be used is at most about 100 to 140 ° C., and the thermal expansion coefficient of an aluminum alloy is actually 18 to 140 ° C.
It was found that there was no problem if it was about 20 × 10 −6 / ° C., and various studies were conducted to reduce the thermal expansion coefficient of the aluminum alloy.
【０００７】アルミニウム合金の熱膨張係数を低下させ
ることに有効な添加元素としてはＳｉがあり、Ｓｉ量を
多くすると熱膨張係数が低くなることは公知である（特
開平２ー６１０２５号参照）。また、アルミニウム合金
の熱膨張係数を低下させる元素としては、さらにＦｅ、
Ｃｒ、Ｍｎ、Ｎｉ等が知られている（特開昭６１ー２５
９８２９号参照）。It is known that Si is an additional element effective in lowering the coefficient of thermal expansion of aluminum alloys, and that the coefficient of thermal expansion decreases as the amount of Si increases (see JP-A-2-61025). Further, as an element that lowers the thermal expansion coefficient of the aluminum alloy, Fe,
Cr, Mn, Ni, etc. are known (JP-A-61-225).
9829).
【０００８】まずＳｉの添加量について検討した。通常
のＪＩＳ ＡＤＣ１２材に相当するＣｕ：３．０％で固
定し、Ｓｉ量を変化させた場合の各Ｓｉ量に対する熱膨
張係数の変化を図２に示す。図２より確かにＳｉ量が増
加するに従って、熱膨張係数は低下していく。しかし、
Ｓｉ量が共晶点の１１．７重量％を越えると初晶Ｓｉが
晶出し、さらに１２重量％を越えると初晶Ｓｉが増加
し、強度、加工性及び湯流れが低下するといった問題が
あることが分かった。Ｓｉが１２重量％では、熱膨張係
数は２０．２×１０-6／℃程度であり、前記した目標値
を若干上回っている。First, the amount of Si added was examined. FIG. 2 shows the change in the thermal expansion coefficient with respect to each Si amount when the amount of Si was changed by fixing at Cu: 3.0% corresponding to an ordinary JIS ADC12 material. As is apparent from FIG. 2, the coefficient of thermal expansion decreases as the amount of Si increases. But,
When the amount of Si exceeds 11.7% by weight of the eutectic point, primary Si crystallizes, and when it exceeds 12% by weight, the amount of primary Si increases and there is a problem that strength, workability and molten metal flow decrease. I found out. When Si is 12% by weight, the coefficient of thermal expansion is about 20.2 × 10 −6 / ° C., which is slightly above the target value.
【０００９】そこで、本発明者らは他の熱膨張係数低下
元素について検討を行った結果、Ｃｒ、Ｍｎは鋳造時の
添加の歩留まりが悪く実際の使用が難しいことが分かっ
た。さらにＣｕの添加について検討した結果、Ｃｕの添
加量を増加した場合には、熱膨張係数が低下し、特に他
の機械的性質には悪影響を及ぼさないことを見い出し本
発明に想到した。また、さらに低熱膨張係数が必要な場
合には、Ｎｉを適量添加すれば良いことを見いだした。Therefore, as a result of studying other elements for decreasing the coefficient of thermal expansion, the present inventors have found that Cr and Mn have a poor yield of addition during casting and are difficult to actually use. Further, as a result of studying addition of Cu, it was found that when the addition amount of Cu was increased, the thermal expansion coefficient was lowered, and particularly other mechanical properties were not adversely affected, and the present invention was conceived. It was also found that when a lower coefficient of thermal expansion is required, a suitable amount of Ni should be added.
【００１０】すなわち、第１の発明は、Ｓｉ：１１〜１
２重量％、Ｃｕ：３〜４重量％を含有し、残部が実質的
にＡｌからなる組成を有することを特徴とするダイカス
ト鋳造用低熱膨張アルミニウム合金である。また上記の
アルミニウム合金がさらにＮｉを３．５％以下含むこと
を特徴とするダイカスト鋳造用低熱膨張アルミニウム合
金である。また上記のアルミニウム合金が１８×１０-6
〜２０×１０-6の熱膨張係数を有すると好適である。さ
らに第２の発明は上記組成を有するアルミニウム合金を
用いてダイカスト鋳造で作製した自動車部品、特にディ
ファレンシアル用キャリア又はディファレンシアル用ハ
ウジング等の部品である。That is, the first invention is Si: 11-1.
It is a low thermal expansion aluminum alloy for die casting, characterized in that it has a composition containing 2% by weight and Cu: 3 to 4% by weight, and the balance substantially consisting of Al. Further, the above-mentioned aluminum alloy is a low thermal expansion aluminum alloy for die casting, characterized by further containing Ni in an amount of 3.5% or less. In addition, the above aluminum alloy is 18 × 10 -6
It is preferable to have a coefficient of thermal expansion of ˜20 × 10 −6 . A second aspect of the present invention is an automobile part manufactured by die casting using an aluminum alloy having the above composition, particularly a part such as a carrier for differentials or a housing for differentials.
【００１１】[0011]
【作用】本発明のアルミニウム合金は、Ｓｉ：１１〜１
２重量％、Ｃｕ：３〜４重量％を含有し、残部が実質的
にＡｌからなる組成を有するものであり、その成分の限
定理由は次の通りである。Ｓｉは、熱膨張係数を低下さ
せ、湯流れ性を向上しかつ引け性を改善するために添加
されるが、１１％未満では湯流れ性の改善効果が少な
く、また熱膨張係数低下効果が少ない。１２％を越える
と前述したように初晶Ｓｉが増加し、強度、加工性及び
湯流れ、引け性が低下するといった問題がある。特に好
ましい範囲は適度な量の共晶Ｓｉが晶出し、かつ強度、
加工性、湯流れに影響がない１１．７〜１２．０％であ
る。Ｃｕは焼き付き性を改善するために添加されるが３
％より少ないとその効果が少なくまた熱膨張係数低下効
果が少ないうえに強度も低下する。４％を越えると伸び
が大幅に低下し、割れ感受性が大きくなり、更に鋳造時
の引け性が大きくなり、鋳造欠陥が発生し易くなる。よ
り好ましいＣｕの範囲は３．５〜４％である。The aluminum alloy of the present invention has Si: 11 to 1
2% by weight, Cu: 3 to 4% by weight, and the balance substantially consisting of Al. The reasons for limiting the components are as follows. Si is added to lower the coefficient of thermal expansion, improve the flowability of the molten metal and improve the shrinkability, but if it is less than 11%, the effect of improving the flowability of the molten metal is small and the effect of reducing the coefficient of thermal expansion is small. . If it exceeds 12%, as described above, there is a problem that the primary crystal Si increases and the strength, workability, flow of molten metal, and shrinkability deteriorate. A particularly preferable range is that an appropriate amount of eutectic Si crystallizes out and the strength,
It is 11.7 to 12.0%, which does not affect workability and hot water flow. Cu is added to improve the seizure property, but 3
%, The effect is small, the effect of lowering the thermal expansion coefficient is small, and the strength is also low. If it exceeds 4%, the elongation is greatly reduced, the crack susceptibility is increased, the shrinkability during casting is increased, and casting defects are likely to occur. A more preferable range of Cu is 3.5 to 4%.
【００１２】本発明のアルミニウム合金に含まれる不純
物は機械的強度の低下を防ぐためにできるだけ少ない方
が良いが、具体的にはＪＩＳＡＤＣ１２材と同様の範囲
であれば良い。例えば、Ｍｇは０．３％以下、Ｚｎは
１．０％以下、Ｍｎは０．５％以下、Ｓｎは０．３０％
以下であることが望ましい。The amount of impurities contained in the aluminum alloy of the present invention is preferably as small as possible in order to prevent the mechanical strength from decreasing, but specifically, it may be in the same range as JIS ADC12 material. For example, Mg is 0.3% or less, Zn is 1.0% or less, Mn is 0.5% or less, and Sn is 0.30%.
The following is desirable.
【００１３】さらに本発明合金は熱膨張係数を低下させ
るためにＮｉが添加されるが、３．５％より多いと加工
性が悪くなる。より好ましいＮｉの範囲は３．０〜３．
５％の範囲であり、３．０％以下では熱膨張係数の低下
効果が少なく、３．５％より多いとＮｉ化合物が多数形
成されダイカスト鋳造性や機械的性質が劣るためであ
る。さらに本発明合金には、ダイカスト鋳造時の耐焼き
付き性向上の目的で０．７〜１．３重量％のＦｅを含む
ことが出来る。Ｆｅが０．７重量％より少ないと耐焼き
付き性向上の効果が少なく、１．３重量％を越えるとＡ
ｌ−Ｆｅの針状化合物が出て機械的性質が低下する。ま
た上記のアルミニウム合金は１８×１０-6〜２０×１０
-6／℃の熱膨張係数を有すると鉄製部品と組み合わせて
使用されるデフキャリアやデフハウジングに好適であ
る。熱膨張係数が１８×１０-6／℃よりも小さいと鉄製
部品と熱膨張係数の差は小さくなるが、高々１４０℃程
度で使用するデフキャリアなどとして用いる場合には、
この程度の熱膨張係数であれば実用上問題はない。また
２０×１０-6／℃より大きいと鉄製部品との熱膨張差が
大きいのでベアリングなどの焼き付きが生じ易くなるの
で好ましくない。Further, Ni is added to the alloy of the present invention in order to lower the coefficient of thermal expansion, but if it exceeds 3.5%, the workability becomes poor. A more preferable range of Ni is 3.0 to 3.
It is in the range of 5%, and when it is 3.0% or less, the effect of lowering the coefficient of thermal expansion is small, and when it is more than 3.5%, a large number of Ni compounds are formed and die castability and mechanical properties are poor. Further, the alloy of the present invention may contain 0.7 to 1.3% by weight of Fe for the purpose of improving seizure resistance during die casting. When Fe is less than 0.7% by weight, the effect of improving seizure resistance is small, and when it exceeds 1.3% by weight, A
The needle-like compound of l-Fe appears and the mechanical properties deteriorate. Further, the above aluminum alloy is 18 × 10 −6 to 20 × 10
Having a coefficient of thermal expansion of −6 / ° C. is suitable for a diff carrier and diff housing used in combination with iron parts. If the coefficient of thermal expansion is less than 18 × 10 -6 / ° C, the difference in the coefficient of thermal expansion from that of iron parts will be small, but when used as a differential carrier or the like used at about 140 ° C,
If the coefficient of thermal expansion is about this level, there is no practical problem. On the other hand, if it is higher than 20 × 10 −6 / ° C., the difference in thermal expansion with the iron component is large, and seizure of the bearing or the like is likely to occur, which is not preferable.
【００１４】本発明のアルミニウム合金によりダイカス
ト鋳造により得られた鋳造品は、そのまま使用すること
が出来るし、また必要に応じ（より高い機械的強度を得
るために）、熱処理（Ｔ６処理）を施しても良い。熱処
理条件は、例えば、５１０〜５４０℃の温度で２〜４時
間の溶体化処理を施し、水焼き入れし次いで１４０℃の
温度で２〜６時間の時効処理を施せばよい。なお、熱処
理を施す場合には、共晶Ｓｉを微細化するためにアルミ
ニウム合金中にＳｒを少量添加すると有効である。ただ
し、Ｓｒの添加量が少ないとその効果がなく、多いと偏
析が生じ易くなるので、１００〜２００ｐｐｍの範囲が
好ましい。The cast product obtained by die casting of the aluminum alloy of the present invention can be used as it is, or if necessary (to obtain higher mechanical strength), subjected to heat treatment (T6 treatment). May be. As the heat treatment conditions, for example, solution treatment may be performed at a temperature of 510 to 540 ° C. for 2 to 4 hours, water quenching may be performed, and then aging treatment may be performed at a temperature of 140 ° C. for 2 to 6 hours. When heat treatment is performed, it is effective to add a small amount of Sr to the aluminum alloy in order to refine the eutectic Si. However, if the addition amount of Sr is small, it is not effective, and if it is large, segregation easily occurs. Therefore, the range of 100 to 200 ppm is preferable.
【００１５】本発明のアルミニウム合金は、Ｓｉ：１１
〜１２重量％、Ｃｕ：３〜４重量％、Ｎｉ：３．５重量
％以下といった特定量だけを含有しているので、低熱膨
張係数を有し、さらにダイカスト鋳造に際して良好な湯
流れ性を確保すると共に引け巣の発生を極めて少なくで
きると共に、機械的性質（引張り強さ、耐力、伸び）の
高い鋳造品を得ることが出来る。The aluminum alloy of the present invention is Si: 11.
-12 wt%, Cu: 3-4 wt%, Ni: 3.5 wt% or less, so it has a low coefficient of thermal expansion and ensures good flowability during die casting. In addition, the occurrence of shrinkage cavities can be extremely reduced, and a cast product having high mechanical properties (tensile strength, proof stress, elongation) can be obtained.
【００１６】[0016]
【実施例】以下、本発明の実施例について詳細に説明す
るが、本発明はこれら実施例に限るものではない。表１
に示す１１種類のアルミニウム合金の溶湯を準備し、縦
型ダイカストマシーンを使用して図１に示すデフキャリ
アを鋳造した。ここで各溶湯（温度６８０〜７００℃）
は、プランジャーチップを２ｍ／ｓｅｃで移動させるこ
とにより、金型（温度１５０℃）内のキャビティに注湯
し次いで凝固させた。なお、デフキャリアの主要寸法
は、Ｄ1＝２００ｍｍ、Ｄ2（外径）＝５０ｍｍ、Ｄ3
（内径）＝４０ｍｍ、ｈ＝３００ｍｍである。上記の各
デフキャリアのフランジ部から試料を切り出し、機械的
強度を測定した。その結果を同じく表１に示す。表１か
ら、例１から８に示す本発明の合金によれば、例９に示
す従来成分よりも熱膨張係数が低いことが分かる。また
Ｃｕ添加量が本発明の範囲よりも多い例１０は確かに熱
膨張係数は低いが伸びが小さいことから実際には使用で
きないことが分かる。さらに例５から例８に示すＮｉ添
加のものの内特に例７と例８のＮｉ添加量の多いものは
低熱膨張係数を示すことが分かる。例１１に示す比較例
のものは熱膨張係数は低下しているが伸びが小さいこと
よりこれも実際には使用できないことが分かる。EXAMPLES Examples of the present invention will be described in detail below, but the present invention is not limited to these examples. Table 1
The molten aluminum alloys of 11 kinds shown in 1 were prepared, and the differential carrier shown in FIG. 1 was cast using a vertical die casting machine. Here each molten metal (temperature 680-700 ° C)
In the case of (2), the plunger tip was moved at a rate of 2 m / sec, thereby pouring the molten metal into the cavity in the mold (temperature 150 ° C.) and then solidifying it. The main dimensions of the differential carrier are D1 = 200 mm, D2 (outer diameter) = 50 mm, D3
(Inner diameter) = 40 mm, h = 300 mm. A sample was cut out from the flange of each of the above-mentioned differential carriers, and the mechanical strength was measured. The results are also shown in Table 1. It can be seen from Table 1 that the alloys of the present invention shown in Examples 1 to 8 have a lower coefficient of thermal expansion than the conventional components shown in Example 9. Further, it is understood that Example 10 in which the amount of added Cu is larger than the range of the present invention cannot be actually used because the coefficient of thermal expansion is low but the elongation is small. Further, it can be seen that among the Ni-added ones shown in Examples 5 to 8, especially those having a large Ni-added amount in Examples 7 and 8 exhibit a low thermal expansion coefficient. In the comparative example shown in Example 11, the coefficient of thermal expansion is lowered, but the elongation is small, so it can be seen that this cannot be actually used.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】以上に記述の如く、本発明のアルミニウ
ム合金は、Ｓｉの含有量が高く、さらに熱膨張係数低下
のためにＣｕを含有しているので、デフキャリア等に鉄
製品と組み合わせて使用しても隙間の出来ないダイカス
ト鋳造品を得ることが出来る。また本発明の合金組成を
有するデフキャリア及びハウジングは機械的強度が高い
ので、鋳造後の熱処理をせずともそのまま使用すること
が可能となる。As described above, since the aluminum alloy of the present invention has a high Si content and further contains Cu for decreasing the thermal expansion coefficient, it can be used in a differential carrier or the like in combination with an iron product. It is possible to obtain a die cast product with no gaps even when used. Moreover, since the differential carrier and the housing having the alloy composition of the present invention have high mechanical strength, they can be used as they are without heat treatment after casting.
【図１】デフキャリア・ハウジングの一例を示す斜視図
である。FIG. 1 is a perspective view showing an example of a differential carrier housing.
【図２】Ｓｉ添加量と熱膨張係数の関係を示す図であ
る。FIG. 2 is a diagram showing the relationship between the amount of Si added and the coefficient of thermal expansion.
１ デフキャリア ２ デフハウジング 1 differential carrier 2 differential housing
Claims (5)
重量％を含有し、残部が実質的にＡｌからなる組成を有
することを特徴とするダイカスト鋳造用低熱膨張アルミ
ニウム合金。1. Si: 11 to 12% by weight, Cu: 3 to 4
A low thermal expansion aluminum alloy for die casting, characterized in that it has a composition containing wt% and the balance substantially consisting of Al.
重量％、Ｎｉ：３．５重量％以下を含有し、残部が実質
的にＡｌからなる組成を有することを特徴とするダイカ
スト鋳造用低熱膨張アルミニウム合金。2. Si: 11 to 12% by weight, Cu: 3 to 4
%, Ni: 3.5% by weight or less, and a composition having a balance substantially consisting of Al, a low thermal expansion aluminum alloy for die casting.
２０×１０-6／℃の熱膨張係数を有することを特徴とす
る請求項１又は請求項２に記載のダイカスト鋳造用低熱
膨張アルミニウム合金。3. The aluminum alloy is 18 × 10 −6
The low thermal expansion aluminum alloy for die casting according to claim 1 or 2, which has a thermal expansion coefficient of 20 × 10 -6 / ° C.
のアルミニウム合金で形成したことを特徴とする自動車
部品。4. An automobile part formed of the aluminum alloy according to any one of claims 1 to 3.
キャリア又はディファレンシャル用ハウジングであるこ
とを特徴とする請求項４に記載の自動車部品。5. The automobile part according to claim 4, wherein the automobile part is a differential carrier or a differential housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30736194A JPH08165537A (en) | 1994-12-12 | 1994-12-12 | Low thermal expansion aluminum alloy for die casting and automobile part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30736194A JPH08165537A (en) | 1994-12-12 | 1994-12-12 | Low thermal expansion aluminum alloy for die casting and automobile part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08165537A true JPH08165537A (en) | 1996-06-25 |
Family
ID=17968168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30736194A Pending JPH08165537A (en) | 1994-12-12 | 1994-12-12 | Low thermal expansion aluminum alloy for die casting and automobile part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08165537A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003073788A (en) * | 2001-09-03 | 2003-03-12 | Denso Corp | Method for partially strengthening light-alloy die-cast member |
| WO2006056686A2 (en) * | 2004-11-26 | 2006-06-01 | Ks Kolbenschmidt Gmbh | Aluminium alloy for component with high hot process mechanical strength |
| JP2015203142A (en) * | 2014-04-15 | 2015-11-16 | 日産自動車株式会社 | Heat treatment method of aluminum alloy die casting member and aluminum alloy die casting member |
-
1994
- 1994-12-12 JP JP30736194A patent/JPH08165537A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003073788A (en) * | 2001-09-03 | 2003-03-12 | Denso Corp | Method for partially strengthening light-alloy die-cast member |
| WO2006056686A2 (en) * | 2004-11-26 | 2006-06-01 | Ks Kolbenschmidt Gmbh | Aluminium alloy for component with high hot process mechanical strength |
| FR2878534A1 (en) * | 2004-11-26 | 2006-06-02 | Ks Kolbenschmidt Gmbh | ALUMINUM ALLOY FOR HIGH HARD MECHANICAL RESISTANCE PIECE |
| WO2006056686A3 (en) * | 2004-11-26 | 2007-02-15 | Ks Kolbenschmidt Gmbh | Aluminium alloy for component with high hot process mechanical strength |
| JP2015203142A (en) * | 2014-04-15 | 2015-11-16 | 日産自動車株式会社 | Heat treatment method of aluminum alloy die casting member and aluminum alloy die casting member |
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